Located inside The Rittenhouse Hotel, The Library Bar is a hidden gem of luxe cocktail bars. You'll feel a bit like you were transported to one of those lavish castles from a movie that’s set in a non-existent, vaguely European-sounding country. There’s a fireplace, ornate chandeliers, vintage books, and, most importantly, strong drinks to keep you warm. Their drinks and (limited) dinner menu change throughout the year, so even if it’s not fireplace season, it’s still worth a trip for a classic or creative cocktail—as long as you’re cool with spending $24 on a drink. It’s perfect to pop in for an aperitif on a romantic date night, or after you’ve eaten at one of the many restaurants nearby.